Struggling With Caretaking an Aging Parent

I had no idea where to properly post this, so I came here. I still have a year of nursing school to go (alone that is a major stressor), am married and have young children at home. My father, had a fall a few months back, some bad breaks and being in his 80's will likely never be able to return to his home/independent living again. He requires significant care now to do almost everything. He's never been good with money, didn't plan on living so long, so it falls to my siblings and I to care for him in his now advanced age.

I suppose my struggle is this, my father was physically and mentally abusive to my siblings and I as children. Even now, he still is not always the nicest human being but has mellowed slightly as he's advanced in age. The abuse he inflicted upon us as children was incredibly bad, he would've been in prison by today's standards. Bad enough that now only a fraction of my siblings (including myself) have been "willing" to try and assist him with his care. But, the old monster sometimes still lurks in that old man and can be difficult and mean even now. That makes me sound like a terrible human being, but if you can imagine horrendous abuse, you're probably not far from what we endured.

My siblings and I suddenly have to take on the care of the one who victimized us for so many years. It's impacted us all, has us on edge, and we only really have each other to express the emotions of this burden to. We have looked into assisted living/care giving but the cost is too great for us to financially bear and like I said my father never financially planned anything other than his actual death arrangements.

I don't know what type of advice I hope to get from this post if any, maybe just encouragement alone will help get me through this.